rubber band on googlemaps with custom event

TTMSFNCOpenLayer has a sort of "rubber band" that can be activated with the shift state: would it be possible to implement the same functionality in TMSFNCGoogleMaps with the activation of a custom event when the mouse button is released?
Edit fiddle - JSFiddle - Code Playground implements a similar functionality in googlemaps but I wouldn't know how to integrate it into TMSFNCGoogleMaps.
Thank you


Thank you for your suggestion!
We'll investigate if this feature can be added in a future version of TMS FNC Maps;